Adjustable tool-holder.



I PATENTED DEC. 3

PiF. CONNBLLY. ADJUSTABLE TOOL HOLDER. APPLICATION FILED MAY 10, 1907.

W) T/VESSES F A TTOR/VE Y3 UNITED STATES PATENT OFFICE.

ADJUSTABLE TOOL-HOLDER.

Specification of Letters Patent.

Patented Dec. 3, 1907.

Application filed May 10 1907. Serial No. 372.912.

T 0 all whom it may concern:

Be it known that I, PATRICK F. OoNNELLY, a citizen of the United States,residing at Sioux Falls, in the county of Minnehaha and State of SouthDakota, have invented a new and useful Adjustable Tool-Holder, of whichthe following is a specification.

This invention relates to an adjustable handle for trowels and othertools used for laying side-walks, floors walls etc., of cement and likematerials; and is an improvement on the subject matter of a patentgranted to the present applicant on January 29, 1907 and numbered842,770.

The object of the invention is to provide a handle on which any tool ofthe type described may be quickly and securely fastened at anyhorizontal angle and means for readily adjusting the handle to anyvertical angle with respect to the working face of the tool. WVith ahandle of suitable length attached to the tool by these two means ofadjustment, the work accomplished in a given time will be greater, moreperfectly done and with less fatigue and exertion in cramped anduncomfortable positions on the part of the workmen than by the ordinarymethod.

To this end the invention comprises certain novel construction,combination and arrangement of parts hereinafter described anddefinitely claimed.

In the accompanying drawings :Figure 1 is a perspective view of theadjustable handle attached to a flat smoothing and finishing trowel. Fi2 is a vertical cross sectional view through the center of the troweland its adjusting means. Fig. 3 is a horizontal sectional view on theline 33 of Fig. 2. Fig. 4 is a perspective view of a blade for edgefinishing. Fig. 5 is a similar view of a jointer blade, and Fig. 6 is aperspective view of an ordinary pointing trowel adapted for use on theadjustable handle.

Similar numerals of reference indicate the same parts on all thefigures.

Referring particularly to Figs. 1, 2 and 3, the numeral 1 indicates atrowel blade of rectangular shape for smoothing and finishing surfaces,the length of which is about five times its width.

The trowel ismade preferably of thin steel, smooth on its under side andhaving a central longitudinal rib or brace 2, extending approximatelyfrom end to end, on its upper side and secured thereto by rivets,

screws or other suitable means. The rib 2 is flat on its under side andcurved transversely above except at its longitudinal center 3 where itis flattened to afford a smooth bearing surface for the attaching head 4of the handle. Rising vertically from the flattened portion 3 is a pin 5threaded at 6 as shown.

The attaching head 4 comprises a tubular vertical socket 7 and asemicircular projection 8 the axis of which is horizontal. Within thesocket 7 is a rotatable stem 9 bored out and threaded at its lower endfor engaging the threaded pin 5 on the trowel. The upper end of the stem9 reaches to the top of the socket 7 of the attaching head, where a handwheel 10 is attached to the stem for rotating it. At any convenientdistance between the ends of the socket 7 is a threaded hole for a screw11, the inner end of which screw engages a groove 12, formed in the stem9, to prevent end movement of the stem, but permit indefinite rotation.The bottom 13 of the socket 7 is made smooth and perpendicular to itsaxis, so that when in place it will bear equally on the surface 3 of therib 2.

The tool is quickly attached to the head socket 7 by slipping the pin 5of the tool, into the opening 14 in the head socket and then turning thehand wheel 10. The thread 6 of the pin will immediately be engaged bythe threaded opening in the stem 9 and drawn up until the surface 3 andthe bottom 13 of the socket 7 bear tightly against each other. Thetrowel may be set at any horizontal angle prior to tightening the screw.

The handle 15 may be of any desired length, to opposite sides of whichat its lower end are two plates 16 fastened to the handle and to eachother by through rivets 17. The free end of each plate 16,terminates ina disk 18 through the center of said disks are formed holes, one beingsquare the other round and corresponding in diameter with a hole 19 inthe semi-circular projection 8 on the attaching head 4. Through theholes in the disks and the hole 19 in the projection 4 is placed aheaded bolt 20, provided with a square portion 21 between the head 22 tofit into the square opening in the disk, the remainder of the bolt 20 isround and extends through the projection 4 and the other disk 18. Abutterfly nut 23 threaded on the bolt 20, when turned to the rightclamps the disks 18 to the semicircular projection 4 and holds thehandle 15 in whatever position it had been placed.

From the above it will be observed that before tightening the screw pinon the trowel, it is to be set at the proper horizontal angle to thehandle, and before finally tightening the thumb nut 23, the verticalangle of the handle with respect to the face of the trowel will befixed.

An edging blade 24 or a jointer-blade 25, see Figs. 4 and 5, may beattached to the stem 9 in a manner similar to the trowel 1, as each ofthe aforesaid. blades has an upright threaded pin 5 similar in allrespects to the one fixed to the trowel. In addition to the edging bladeand jointer-blade, an ordinary pointing trowel 26, witha straightthreaded pin 27 extending from the rear of the blade, can also be fittedto the stem 5. (See Fig. 6.) Any one of these several blades may beattached to the handle and then adjusted as described to suit theposition of the person using it, whether he be sitting, kneeling, orstanding on a level with the surface under treatment or above or belowsaid surface.

A removable handle adapted to fit the pins on all the blades, such as isrepresented in Fig. 4., will be found convenient.

I claim 1. An adjustable tool holder comprising a socket having a sideprojection integrally formed thereon, a stem in said socket ada ted torotate therein and having a threa ed axial opening in its lower end toengage a threaded projection on a tool, means for preventing endwisemovement of said stem, a handle pivoted to said projection and means forclamping said handle to said projection.

2. An adjustable tool holder comprising a socket having an integralprojection on one side, a'movable handle, a pivot bolt for said handleextending through said projection and means on said bolt for fasteningthe parts against movement, a rotatable stem within said socket andhaving a threaded axial opening in its lower end, a handwheel on theupper end of said stem for rotating it and means for preventing endwisemovement of said stem, combined with a tool having a threaded projectionadapted to enter the threaded opening in the stem and be clamped againstsaid socket.

In testimony that I claim the foregoing as my own, I have hereto afiixedmy signature in the presence of two witnesses.

PATRICK F. CONNELLY.

Witnesses:

JOHN C. BRANDT, THos. W. SExToN.

